General Training Air Conditioning 2OLGTAC2

CourseGeneral Training Air Conditioning 2OLGTAC2

OL GTAC2 at-a-glance

This online course provides new technicians and people desiring a better understanding of air conditioning systems including theory, components and troubleshooting. This series builds on the concepts covered in General Training Air Conditioning I. Topics covered include refrigerant characteristics, system dehydration and charging, refrigerant piping and system installation. In addition part load operation and troubleshooting methods are covered. This program consists of 9 modules and is available as each module or as a complete course. To receive FAD credit you must pass the final exam.

*To register for individual modules, select the module from the list below and click 'Register'.

Course Overview

Servicing heating and air conditioning systems requires a solid knowledge in the fundamental principles of air conditioning system operation. This online training series provides the background to understand both the theory and function of components used in heating and air conditioning systems. The General Training Air Conditioning series is in two sections; GTAC1 covers the theory and fundamental concepts and GTAC2 covers more advanced topics and basic troubleshooting skills. These modules are presented in simple language and concentrate on presenting the concepts in ways that can be easily understood by people new to the industry. After completing these modules, a student should possess the understanding of the concepts behind the air conditioning process, the types of systems and components, and basic troubleshooting techniques. Each module is self-paced and contains a quiz and final exam for the section, each with reference to the appropriate section of the module, allowing students to evaluate their understanding of the concepts presented. To receive FAD credit you must pass the module or final exam.

HVAC Training Objectives

Who Should Take This Training

This course is new technicians or others in the industry who wants to better understand air conditioning theory, components and troubleshooting of HVAC systems.

HVAC Training Methods Used

This course is a narrated online PowerPoint lecture with animations. Student’s achievement of the learning objectives is determined by successful completion of the module skill check and / or final online exam.

Course Details

Module 1 – Refrigerant Characteristics

Course Overview

This module discusses refrigerant types, characteristics, and oil compatibility of pure azeotropes, and zeotrope blends. It focuses on proper application and safe handling for new, replacement refrigerants used in air conditioning and refrigeration systems.

HVAC Training Objectives

Define what a refrigerant is

Explain how ODP and GWP are changing the refrigerants we use

Explain the difference between an azeotropic and a zeotropic and the meaning of the terms glide and fractionation

List three methods for detecting leaks in systems charged with fluorocarbon refrigerants

From memory, list at least four damaging effects of moisture in the refrigeration cycle

Use a P/T chart for a pure refrigerant or azeotropic blend to find saturation temperature when pressure is given

Use a P/T chart for a zeotropic blend refrigerant to find its bubble point and dewpoint temperature when pressure is given

Topics Covered*

Introduction (14)

Industry in transition (9)

Classifying refrigerants (6)

Application tips (7)

Refrigerant properties (22)

*All times are approximate and shown as (time in minutes).

Register for this Module

Module 2 – Refrigerant Oils

Course Overview

The second module covers oils used in air conditioning systems and how they are properly applied. Topics include compatibility with new, replacement refrigerants and change-out procedures.

HVAC Training Objectives

List four purposes served by oil in the mechanical refrigeration system

State the difference between fluid film lubrication and boundary lubrication

List four types of oil, according to their source, and state which ones are used as refrigerant oils

Describe the differences between synthetic oil and mineral oil

Describe the safest way for a service technician to select the proper oil for any application

List at least four ways a service technician can prevent contamination of the oil-refrigerant solution

Topics Covered*

Introduction (14)

Kinds of oil (9)

Performance quality of oil (10)

Oil-refrigerant solutions (7)

Oil problems (17)

*All times are approximate and shown as (time in minutes).

Register for this Module

Module 3 – Refrigerant Piping

Course Overview

Module 3 familiarizes you with enough detail to spot and modify obvious field piping errors. Topics covered are piping requirements, sizing, insulation, and support and piping loops.

HVAC Training Objectives

List at least six things to look for in a well-designed, field-piping system

Name at least five dangers of oversizing suction or hot gas lines

Identify the places in a mechanical refrigeration system where oil return presents the biggest problem

Explain how oil return is handled in systems that use a miscible or partially-miscible refrigerant

Check the size of all three of the major refrigerant lines using the Ballpark Line Sizing Charts

Check the suction and hot gas riser size using the Ballpark Sizing Charts

When given a suction line size, find the riser sizes for riser A and riser B of a double suction riser

List from memory, at least four possible fixes for flash gas at the metering device

Explain which refrigerant lines are insulated and with what material. Also explain how often and under what circumstances each line may be insulated

Topics Covered*

Pipe requirements (8)

Pipe sizing (13)

Risers (12)

Flash gas – causes and solutions (6)

Supports and piping loops (7)

*All times are approximate and shown as (time in minutes).

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Module 4 – System Dehydration

Course Overview

This module discusses moisture problems and their effect on air conditioning systems, and the importance of moisture elimination during evacuation.

HVAC Training Objectives

Predict what will happen to a system that is improperly dehydrated

List four examples of the damage water does in a system

State the maximum PPM of water for “dry” refrigerant and oil

Define “deep vacuum”

State the steps in deep vacuum method of dehydration

Explain how to check a system for tightness and dryness following deep vacuum evacuation/dehydration

Describe the steps for the triple evacuation process

Explain how a filter-drier dehydrates a system even though the moisture stays in the system

Topics Covered*

The need for dehydration (23)

Dehydration methods (41)

*All times are approximate and shown as (time in minutes).

Register for this Module

Module 5 – Charging, Recovery, Recycling & Reclamation

Course Overview

This module explains how to charge, recover and recycle traditional and replacement halocarbon refrigerants. It also focuses on tools and equipment used.

HVAC Training Objectives

State the differences between refrigerant recovery, recycling and reclamation

Identify the refrigerant type when given the color of the refrigerant cylinder

Label the five ports on a standard gauge manifold

Identify the procedures that can be done when an in-line service valve position is given

Identify two areas in a system where refrigerant can be stored during servicing operations

Explain the differences between a recovery unit and a recovery/recycle unit

List at least two special precautions required for charging zeotropic blends which are not required when charging pure refrigerants or azeotropic refrigerant blends

Determine system superheat or subcooling using a temperature sensor gauge manifold and the pressure-temperature chart for the refrigerant involved

State how to adjust system charge when superheat is too high and when subcooling is too high

Topics Covered*

Introduction (13)

Tools and equipment (11)

Refrigerant recovery (8)

Refrigerant charging (33)

*All times are approximate and shown as (time in minutes).

Register for this Module

Module 6 – Installation Procedures

Course Overview

All facets of refrigeration system installation are covered including planning, piping, brazing, wiring, pump down, prestart checks, and start-up and safety essentials.

HVAC Training Objectives

Prepare a planning check list for an installation

List from memory, the four areas of safety that are a consideration for any installation

Describe three ways to control equipment vibration and noise at its source

Specify, from memory, sizing and pitch guidelines for condensate lines

State two or more precautions required in handling and storing “ACR” copper piping

Explain the similarities and differences between brazing and soldering methods

Explain how nitrogen used while soldering or brazing helps insure maximum system life

Topics Covered*

Introduction (13)

Equipment placement (6)

Vibration isolation and noise control (17)

Piping systems (28)

*All times are approximate and shown as (time in minutes).

Register for this Module

Module 7 – Heat Pumps

Course Overview

Module 7 covers the overall concept of the heat pump, its operation, benefits and disadvantages, operating economics, servicing concerns and how water-source heat pumps are used for heat reclaim in commercial buildings.

HVAC Training Objectives

List six basic components you would expect to find on any heat pump system

Predict frequency of compressor operation above the balance point, at the balance point and below it

Module 9 – Troubleshooting

Course Overview

HVAC Training Objectives

List from memory, the five key ingredients required for successful troubleshooting

List from memory, at least four safety precautions a technician should take when servicing a system

Select from a list the four most common electrical meters used in air conditioning service and match them to their function

Explain the difference between a symptom and the root cause of a problem

Select from a list the five important instruments used in troubleshooting refrigeration problems and match them to their use

List the system vital signs that must be measured in order to troubleshoot the mechanical refrigeration system

Use the Component Symptom Analysis and System Symptom Analysis chart to identify the possible causes for a given system problem

Topics Covered*

Electrical troubleshooting (24)

Troubleshooting the mechanical refrigeration system (36)

Troubleshooting exercises (16)

*All times are approximate and shown as (time in minutes).

Register for this Module

Course Requirements

Completion Requirements

To receive a certificate for any module or for the complete course a student must receive a grade of 70% on the module skill check or final exam. Once you complete the exam you will be able to print a certificate.